What is the purpose of paper?

The first use is to produce pictorial, which requires the printed paper to be white and smooth enough.

The second purpose is to produce embossed paper, which has four grades. The higher the grade, the worse the paper quality.

The third use is to produce newsprint, which requires that the paper is soft enough, elastic enough, and the speed and ability to absorb ink is good enough.

The fourth use is to produce book cover paper, which is a kind of paper used to wrap book covers. It needs to be thicker and colored.

The fifth use is to produce writing paper for writing, which requires good ink absorption.

The sixth purpose is to enrich the paper after production, and the main requirement is to have enough hardness and thickness.

Extended data:

There are many kinds of paper, and the classification methods are different. There are three customary classification methods:

1, divided into handmade paper and machine-made paper according to production methods.

Hand-made paper mainly depends on manual operation, using curtain grid and manual fishing one by one. Soft texture, strong water absorption, suitable for ink writing, painting and printing, such as China Xuan paper. Its output accounts for only a small part of the total output of modern paper. Machine-made paper refers to the general name of paper produced by mechanization, such as printing paper and wrapping paper.

2. According to the thickness and weight of paper, it is divided into paper and cardboard.

There is no strict difference between the two. Generally speaking, those weighing less than 200 grams per square meter are called paper and those weighing more than 200 grams are called cardboard. Cardboard accounts for about 40 ~ 50% of the total paper output, and is mainly used for commodity packaging, such as box cardboard and packaging cardboard. In the world, paper and cardboard are usually counted separately.

3. According to the purpose, it can be divided into packaging paper, printing paper, industrial paper, office paper, cultural paper, household paper and special paper.